diff --git modules/hs_taxonomy.module modules/hs_taxonomy.module
index 4d07f0a..c7ecb46 100644
--- modules/hs_taxonomy.module
+++ modules/hs_taxonomy.module
@@ -272,7 +272,7 @@ function hs_taxonomy_widget_process($element, &$form_state, $complete_form) {
 function hs_taxonomy_hierarchical_select_params() {
   $params = array(
     'vid',
-    'exclude_tid',                // Allows a term to be excluded (necessary for the taxonomy_form_term form).
+    'exclude_tid',                // Allows multiple terms to be excluded (necessary for the taxonomy_form_term form).
     'root_term',                  // Displays a fake "<root>" term in the root level (necessary for the taxonomy_form-term form).
     'entity_count_for_node_type', // Restrict the entity count to a specific node type.
   );
@@ -299,10 +299,14 @@ function hs_taxonomy_hierarchical_select_root_level($params) {
     $terms = array_merge(array($root_term), $terms);
   }
 
-  // Unset the term that's being excluded, if it is among the terms.
+  // Unset the terms that's being excluded, if it is among the terms.
   if (isset($params['exclude_tid'])) {
+    if (!is_array($params['exclude_tid'])) {
+      // Normalize $params['exclude_tid'] to an array.
+      $params['exclude_tid'] = array($params['exclude_tid']);
+    }
     foreach ($terms as $key => $term) {
-      if ($term->tid == $params['exclude_tid']) {
+      if (in_array($term->tid, $params['exclude_tid'])) {
         unset($terms[$key]);
       }
     }
@@ -331,8 +335,15 @@ function hs_taxonomy_hierarchical_select_children($parent, $params) {
 
   $terms = taxonomy_get_children($parent, $params['vid']);
 
-  // Unset the term that's being excluded, if it is among the children.
-  unset($terms[$params['exclude_tid']]);
+  // Unset the terms that's being excluded, if it is among the children.
+  if (is_array($params['exclude_tid'])) {
+    foreach ($params['exclude_tid'] as $tid) {
+      unset($terms[$tid]);
+    }
+  }
+  else {
+    unset($terms[$params['exclude_tid']]);
+  }
 
   // If the Term Permissions module is installed, honor its settings.
   if (function_exists('term_permissions_allowed')) {
@@ -386,10 +397,14 @@ function hs_taxonomy_get_parents_all($tid) {
  * Implementation of hook_hierarchical_select_valid_item().
  */
 function hs_taxonomy_hierarchical_select_valid_item($item, $params) {
+  if (isset($params['exclude_tid']) && !is_array($params['exclude_tid'])) {
+    // Normalize $params['exclude_tid'] to an array.
+    $params['exclude_tid'] = array($params['exclude_tid']);
+  }
   if (isset($params['root_term']) && $params['root_term'] && $item == 0) {
     return TRUE;
   }
-  else if (!is_numeric($item) || $item < 1 || (isset($params['exclude_tid']) && $item == $params['exclude_tid'])) {
+  else if (!is_numeric($item) || $item < 1 || (isset($params['exclude_tid']) && in_array($item, $params['exclude_tid']))) {
     return FALSE;
   }
   $term = taxonomy_term_load($item);